Gravesendの時間
19:38:31
日の出: 04:59:34 
日没: 20:50:3302:38:31
21:38:31
15:38:31
00:08:31
12:38:31
02:38:31
23:38:31
02:38:31
02:38:31
00:08:31
21:38:31
02:38:31
00:38:31
03:38:31
15:38:31
Gravesendと主要都市の時差
19:38:31
-8
11:38:31
+7
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-1
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-8